A car’s road grip and stability depend on correctly balanced tyres maintained with wheel balancing. It is a process that removes any imbalances by evenly distributing weight between tyres and wheel assemblies.
With evenly distributed weight across all four wheels, the vehicle travels smoothly and suffers minimal uneven tyre wear. Moreover, smoother rides can contribute to greater fuel efficiency.
Let’s explore more about the process of auto wheel balancing, its types and common causes of unbalanced tyres.
More About the Types of Wheel Balancing in Cars
Based on their methods and mechanisms, wheel balancing processes are mainly of two types: static and dynamic wheel balancing. Let’s take a closer look at each of them:
Static Wheel Balancing
Static wheel balance is a process in which the wheel’s centre of mass is balanced around its rotational axis. The step-by-step details of the process are as follows.
Process of Static Wheel Balancing
- The process begins by inspecting the wheel for any signs of damage or defects. This includes checking for bends, cracks, or other issues that may affect the balance.
- The tyre is mounted onto the wheel using specialised equipment. It is essential to ensure that the tyre is properly seated on the rim to achieve accurate balancing.
- The wheel and tyre assembly are then placed on a wheel balancing machine. The accurate measurement is then calibrated by inputting necessary parameters, such as wheel diameter and width, into the machine.
- The wheel is placed on a non-rotating spindle. Here the centre of the wheel’s mass is balanced around its rotational axis. They are rotated on their axis. The process is used to remove anomalies in load and counter any extra forces coming from the opposite direction.
- The process is carried out manually until the mass is evenly distributed along its axis.
- The wheel assembly is re-inspected on the balancing machine. This is to double-check that the weight distribution irregularities have been removed.
Dynamic Wheel Balancing
Dynamic wheel balancing is the process of identifying and correcting imbalances in a rotating wheel and tyre assembly by considering both static and dynamic forces. The process is detailed as under.
Process of Dynamic Wheel Balancing
- The process starts with the mounting of wheel and tyre assembly on a specialised balancing machine. The machine typically has a spindle that holds the wheel securely in place.
- The machine spins the wheel at high speeds, simulating the rotation of the wheel while the vehicle is in motion. This spinning motion generates dynamic forces on the wheel.
- Sensors or detectors in the dynamic balancing machine measure the imbalances present in the wheel assembly. These sensors can detect both static and dynamic forces exerted by the uneven distribution of the weight.
- Based on the measurements from the sensors, the machine calculates the magnitude and location of the imbalances. The weights are then applied to specific points on the wheel rim to counterbalance the imbalances. These weights are typically attached using adhesive or clip-on tools.
- After adding the initial set of weights, the wheel is spun again to verify if the imbalances have been corrected. If the problem persists, the process is repeated, and additional weights are added as needed.
Static Vs Dynamic Wheel Balancing: Which is Better
Static balancing is the most commonly used method. It is effective in most cases, as it is cheaper and more suitable for standard passenger vehicles than high-performance cars.
Dynamic balancing, on the other hand, is recommended for 4WD/AWD vehicles and racing cars. It is the answer to situations where precise balancing is required.
Since dynamic balancing offers a more comprehensive and accurate balancing solution, it requires specialised equipment and expertise. It is often performed in cases where static balancing alone doesn’t provide proper results.
Choosing between the types of wheel balancing processes also depends on the conditions of affected wheel hub assemblies.
Common Causes of Unbalanced Tyres
Various factors can contribute to unbalanced tyres, resulting in vibrations and uneven wear. Here are some common causes:
Uneven Tyre Wear
This can be caused due to worn tread on one side of the tyre. Uneven tyre wear has plenty of reasons behind it. The most prominent ones among them include improper inflation, reckless driving habits and suspension issues. These are also among some common reasons behind bad wheel alignment.
Wheel Damage
Damaged or bent wheels can disrupt the even distribution of weight, leading to imbalances. Wheels with a damaged surface can also lead to a wobbly driving experience. The impact of potholes, curbs, or accidents can cause wheel damage.
Tyre Mounting Errors
Incorrectly mounting the tyre onto the wheel can introduce imbalances. Mounting errors may include improper fitting or centring of the tyre or using inadequate mounting techniques. All these scenarios can lead to unbalanced tyres.
Ageing Tyres and Wheels
With time, different types of components in tyres and wheels can undergo wear and degradation, such as rusting. These changes can disrupt the weight distribution and balance, potentially affecting wheel balancing.
Suspension Wear
Suspension components, such as shocks, struts, or bushings, may wear out over time. All these potential causes behind bad suspension can also lead to alignment and wheel balancing problems.
Symptoms of Unbalanced Tyres
Here are some common symptoms that may indicate a problem with car wheel balancing:
Vibrations at High Speed
One of the primary signs of wheel balancing problems is vibrations felt through the steering wheel, floorboard and seats. These vibrations are usually most noticeable at higher speeds, such as highway driving. The intensity of the vibrations may increase as the vehicle’s speed increases.
Shaking Steering Wheel
Unbalanced tyres are also among the common reasons for a shaking steering wheel in a car. This creates a wobbling sensation in the steering wheel, especially at certain speeds. The shake may be more pronounced when turning or accelerating.
A shaking steering wheel is also one of the common signs of bad wheel alignment.
Handling Issues
In addition to a shaky steering wheel, bad wheel balancing can affect the vehicle’s handling and stability. The driver may notice that the car pulls to one side, feels unstable, or requires constant steering corrections. These handling issues can be a result of imbalanced wheels affecting the vehicle’s alignment.
Noisy Ride
Cars with bad wheel balancing generate unusual noises while cruising. The driver may hear humming, buzzing, thumping or even a squealing noise from car tyres. These noises can indicate that the tyres are not rotating smoothly due to an imbalanced distribution of weights.
Wheel Balancing Vs Wheel Alignment: Understanding the Difference
The two important maintenance processes of car tyres and wheel assembly are often confused with each other. Although both these processes contribute to smoother rides and improve the lifespan of tyres, they are quite different.
For instance, the process of wheel alignment involves adjusting the angles of the wheels in a car. The process ensures that the wheels are perpendicular to the ground and parallel to each other. Properly aligned wheels also improve steering wheel returnability, making it easy to maintain a straight line while driving.
On the other hand, wheel balancing is a process that ensures the weight is evenly distributed through each tyre and wheel assembly of the car. However, wheel alignment and balancing issues share some common symptoms. This includes vehicle drifting or pulling to one side, vibrations when driving and off-centre steering wheel.
We have covered all these factors and more in our comparative analysis of wheel balancing vs wheel alignment.
There you have it – a detailed overview of the process of wheel alignment, its types and related issues. Moreover, it is important to prevent car tyres from cracking to avoid unbalanced wheel-tyre assembly and experience smoother drives.
After buying a used car in the UAE, take it for a wheel balancing treatment before hitting the road to ensure safety and comfort.
For more car maintenance processes and tips, stay in touch with dubizzle’s auto blog.
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